diff options
Diffstat (limited to '')
| -rw-r--r-- | freebsd/crypto/openssl/crypto/ec/ec_lcl.h | 437 |
1 files changed, 298 insertions, 139 deletions
diff --git a/freebsd/crypto/openssl/crypto/ec/ec_lcl.h b/freebsd/crypto/openssl/crypto/ec/ec_lcl.h index 969fd147..e055ddab 100644 --- a/freebsd/crypto/openssl/crypto/ec/ec_lcl.h +++ b/freebsd/crypto/openssl/crypto/ec/ec_lcl.h @@ -1,72 +1,11 @@ -/* crypto/ec/ec_lcl.h */ /* - * Originally written by Bodo Moeller for the OpenSSL project. - */ -/* ==================================================================== - * Copyright (c) 1998-2010 The OpenSSL Project. All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in - * the documentation and/or other materials provided with the - * distribution. - * - * 3. All advertising materials mentioning features or use of this - * software must display the following acknowledgment: - * "This product includes software developed by the OpenSSL Project - * for use in the OpenSSL Toolkit. (http://www.openssl.org/)" - * - * 4. The names "OpenSSL Toolkit" and "OpenSSL Project" must not be used to - * endorse or promote products derived from this software without - * prior written permission. For written permission, please contact - * openssl-core@openssl.org. - * - * 5. Products derived from this software may not be called "OpenSSL" - * nor may "OpenSSL" appear in their names without prior written - * permission of the OpenSSL Project. - * - * 6. Redistributions of any form whatsoever must retain the following - * acknowledgment: - * "This product includes software developed by the OpenSSL Project - * for use in the OpenSSL Toolkit (http://www.openssl.org/)" - * - * THIS SOFTWARE IS PROVIDED BY THE OpenSSL PROJECT ``AS IS'' AND ANY - * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR - * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE OpenSSL PROJECT OR - * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, - * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT - * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; - * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, - * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) - * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED - * OF THE POSSIBILITY OF SUCH DAMAGE. - * ==================================================================== - * - * This product includes cryptographic software written by Eric Young - * (eay@cryptsoft.com). This product includes software written by Tim - * Hudson (tjh@cryptsoft.com). - * - */ -/* ==================================================================== - * Copyright 2002 Sun Microsystems, Inc. ALL RIGHTS RESERVED. - * - * Portions of the attached software ("Contribution") are developed by - * SUN MICROSYSTEMS, INC., and are contributed to the OpenSSL project. - * - * The Contribution is licensed pursuant to the OpenSSL open source - * license provided above. - * - * The elliptic curve binary polynomial software is originally written by - * Sheueling Chang Shantz and Douglas Stebila of Sun Microsystems Laboratories. + * Copyright 2001-2018 The OpenSSL Project Authors. All Rights Reserved. + * Copyright (c) 2002, Oracle and/or its affiliates. All rights reserved * + * Licensed under the OpenSSL license (the "License"). You may not use + * this file except in compliance with the License. You can obtain a copy + * in the file LICENSE in the source distribution or at + * https://www.openssl.org/source/license.html */ #include <stdlib.h> @@ -74,6 +13,9 @@ #include <openssl/obj_mac.h> #include <openssl/ec.h> #include <openssl/bn.h> +#include "internal/refcount.h" +#include "internal/ec_int.h" +#include "curve448/curve448_lcl.h" #if defined(__SUNPRO_C) # if __SUNPRO_C >= 0x520 @@ -84,6 +26,12 @@ /* Use default functions for poin2oct, oct2point and compressed coordinates */ #define EC_FLAGS_DEFAULT_OCT 0x1 +/* Use custom formats for EC_GROUP, EC_POINT and EC_KEY */ +#define EC_FLAGS_CUSTOM_CURVE 0x2 + +/* Curve does not support signing operations */ +#define EC_FLAGS_NO_SIGN 0x4 + /* * Structure details are not part of the exported interface, so all this may * change in future versions. @@ -102,14 +50,14 @@ struct ec_method_st { void (*group_finish) (EC_GROUP *); void (*group_clear_finish) (EC_GROUP *); int (*group_copy) (EC_GROUP *, const EC_GROUP *); - /* used by EC_GROUP_set_curve_GFp, EC_GROUP_get_curve_GFp, */ - /* EC_GROUP_set_curve_GF2m, and EC_GROUP_get_curve_GF2m: */ + /* used by EC_GROUP_set_curve, EC_GROUP_get_curve: */ int (*group_set_curve) (EC_GROUP *, const BIGNUM *p, const BIGNUM *a, const BIGNUM *b, BN_CTX *); int (*group_get_curve) (const EC_GROUP *, BIGNUM *p, BIGNUM *a, BIGNUM *b, BN_CTX *); /* used by EC_GROUP_get_degree: */ int (*group_get_degree) (const EC_GROUP *); + int (*group_order_bits) (const EC_GROUP *); /* used by EC_GROUP_check: */ int (*group_check_discriminant) (const EC_GROUP *, BN_CTX *); /* @@ -124,9 +72,9 @@ struct ec_method_st { * used by EC_POINT_set_to_infinity, * EC_POINT_set_Jprojective_coordinates_GFp, * EC_POINT_get_Jprojective_coordinates_GFp, - * EC_POINT_set_affine_coordinates_GFp, ..._GF2m, - * EC_POINT_get_affine_coordinates_GFp, ..._GF2m, - * EC_POINT_set_compressed_coordinates_GFp, ..._GF2m: + * EC_POINT_set_affine_coordinates, + * EC_POINT_get_affine_coordinates, + * EC_POINT_set_compressed_coordinates: */ int (*point_set_to_infinity) (const EC_GROUP *, EC_POINT *); int (*point_set_Jprojective_coordinates_GFp) (const EC_GROUP *, @@ -172,6 +120,23 @@ struct ec_method_st { * EC_POINT_have_precompute_mult (default implementations are used if the * 'mul' pointer is 0): */ + /*- + * mul() calculates the value + * + * r := generator * scalar + * + points[0] * scalars[0] + * + ... + * + points[num-1] * scalars[num-1]. + * + * For a fixed point multiplication (scalar != NULL, num == 0) + * or a variable point multiplication (scalar == NULL, num == 1), + * mul() must use a constant time algorithm: in both cases callers + * should provide an input scalar (either scalar or scalars[0]) + * in the range [0, ec_group_order); for robustness, implementers + * should handle the case when the scalar has not been reduced, but + * may treat it as an unusual input, without any constant-timeness + * guarantee. + */ int (*mul) (const EC_GROUP *group, EC_POINT *r, const BIGNUM *scalar, size_t num, const EC_POINT *points[], const BIGNUM *scalars[], BN_CTX *); @@ -196,34 +161,52 @@ struct ec_method_st { int (*field_decode) (const EC_GROUP *, BIGNUM *r, const BIGNUM *a, BN_CTX *); int (*field_set_to_one) (const EC_GROUP *, BIGNUM *r, BN_CTX *); -} /* EC_METHOD */ ; + /* private key operations */ + size_t (*priv2oct)(const EC_KEY *eckey, unsigned char *buf, size_t len); + int (*oct2priv)(EC_KEY *eckey, const unsigned char *buf, size_t len); + int (*set_private)(EC_KEY *eckey, const BIGNUM *priv_key); + int (*keygen)(EC_KEY *eckey); + int (*keycheck)(const EC_KEY *eckey); + int (*keygenpub)(EC_KEY *eckey); + int (*keycopy)(EC_KEY *dst, const EC_KEY *src); + void (*keyfinish)(EC_KEY *eckey); + /* custom ECDH operation */ + int (*ecdh_compute_key)(unsigned char **pout, size_t *poutlen, + const EC_POINT *pub_key, const EC_KEY *ecdh); + /* Inverse modulo order */ + int (*field_inverse_mod_ord)(const EC_GROUP *, BIGNUM *r, + const BIGNUM *x, BN_CTX *); + int (*blind_coordinates)(const EC_GROUP *group, EC_POINT *p, BN_CTX *ctx); + int (*ladder_pre)(const EC_GROUP *group, + EC_POINT *r, EC_POINT *s, + EC_POINT *p, BN_CTX *ctx); + int (*ladder_step)(const EC_GROUP *group, + EC_POINT *r, EC_POINT *s, + EC_POINT *p, BN_CTX *ctx); + int (*ladder_post)(const EC_GROUP *group, + EC_POINT *r, EC_POINT *s, + EC_POINT *p, BN_CTX *ctx); +}; -typedef struct ec_extra_data_st { - struct ec_extra_data_st *next; - void *data; - void *(*dup_func) (void *); - void (*free_func) (void *); - void (*clear_free_func) (void *); -} EC_EXTRA_DATA; /* used in EC_GROUP */ +/* + * Types and functions to manipulate pre-computed values. + */ +typedef struct nistp224_pre_comp_st NISTP224_PRE_COMP; +typedef struct nistp256_pre_comp_st NISTP256_PRE_COMP; +typedef struct nistp521_pre_comp_st NISTP521_PRE_COMP; +typedef struct nistz256_pre_comp_st NISTZ256_PRE_COMP; +typedef struct ec_pre_comp_st EC_PRE_COMP; struct ec_group_st { const EC_METHOD *meth; EC_POINT *generator; /* optional */ - BIGNUM order, cofactor; + BIGNUM *order, *cofactor; int curve_name; /* optional NID for named curve */ int asn1_flag; /* flag to control the asn1 encoding */ - /* - * Kludge: upper bit of ans1_flag is used to denote structure - * version. Is set, then last field is present. This is done - * for interoperation with FIPS code. - */ -#define EC_GROUP_ASN1_FLAG_MASK 0x7fffffff -#define EC_GROUP_VERSION(p) (p->asn1_flag&~EC_GROUP_ASN1_FLAG_MASK) point_conversion_form_t asn1_form; unsigned char *seed; /* optional seed for parameters (appears in * ASN1) */ size_t seed_len; - EC_EXTRA_DATA *extra_data; /* linked list */ /* * The following members are handled by the method functions, even if * they appear generic @@ -233,7 +216,7 @@ struct ec_group_st { * curves over GF(2^m), this is the irreducible polynomial defining the * field. */ - BIGNUM field; + BIGNUM *field; /* * Field specification for curves over GF(2^m). The irreducible f(t) is * then of the form: t^poly[0] + t^poly[1] + ... + t^poly[k] where m = @@ -249,7 +232,7 @@ struct ec_group_st { * x^3 + a*x + b. For characteristic 2, the curve is defined by an * equation of the form y^2 + x*y = x^3 + a*x^2 + b. */ - BIGNUM a, b; + BIGNUM *a, *b; /* enable optimized point arithmetics for special case */ int a_is_minus3; /* method-specific (e.g., Montgomery structure) */ @@ -259,56 +242,89 @@ struct ec_group_st { /* method-specific */ int (*field_mod_func) (BIGNUM *, const BIGNUM *, const BIGNUM *, BN_CTX *); - BN_MONT_CTX *mont_data; /* data for ECDSA inverse */ -} /* EC_GROUP */ ; + /* data for ECDSA inverse */ + BN_MONT_CTX *mont_data; + + /* + * Precomputed values for speed. The PCT_xxx names match the + * pre_comp.xxx union names; see the SETPRECOMP and HAVEPRECOMP + * macros, below. + */ + enum { + PCT_none, + PCT_nistp224, PCT_nistp256, PCT_nistp521, PCT_nistz256, + PCT_ec + } pre_comp_type; + union { + NISTP224_PRE_COMP *nistp224; + NISTP256_PRE_COMP *nistp256; + NISTP521_PRE_COMP *nistp521; + NISTZ256_PRE_COMP *nistz256; + EC_PRE_COMP *ec; + } pre_comp; +}; + +#define SETPRECOMP(g, type, pre) \ + g->pre_comp_type = PCT_##type, g->pre_comp.type = pre +#define HAVEPRECOMP(g, type) \ + g->pre_comp_type == PCT_##type && g->pre_comp.type != NULL struct ec_key_st { + const EC_KEY_METHOD *meth; + ENGINE *engine; int version; EC_GROUP *group; EC_POINT *pub_key; BIGNUM *priv_key; unsigned int enc_flag; point_conversion_form_t conv_form; - int references; + CRYPTO_REF_COUNT references; int flags; - EC_EXTRA_DATA *method_data; -} /* EC_KEY */ ; - -/* - * Basically a 'mixin' for extra data, but available for EC_GROUPs/EC_KEYs - * only (with visibility limited to 'package' level for now). We use the - * function pointers as index for retrieval; this obviates global - * ex_data-style index tables. - */ -int EC_EX_DATA_set_data(EC_EXTRA_DATA **, void *data, - void *(*dup_func) (void *), - void (*free_func) (void *), - void (*clear_free_func) (void *)); -void *EC_EX_DATA_get_data(const EC_EXTRA_DATA *, void *(*dup_func) (void *), - void (*free_func) (void *), - void (*clear_free_func) (void *)); -void EC_EX_DATA_free_data(EC_EXTRA_DATA **, void *(*dup_func) (void *), - void (*free_func) (void *), - void (*clear_free_func) (void *)); -void EC_EX_DATA_clear_free_data(EC_EXTRA_DATA **, void *(*dup_func) (void *), - void (*free_func) (void *), - void (*clear_free_func) (void *)); -void EC_EX_DATA_free_all_data(EC_EXTRA_DATA **); -void EC_EX_DATA_clear_free_all_data(EC_EXTRA_DATA **); + CRYPTO_EX_DATA ex_data; + CRYPTO_RWLOCK *lock; +}; struct ec_point_st { const EC_METHOD *meth; + /* NID for the curve if known */ + int curve_name; /* * All members except 'meth' are handled by the method functions, even if * they appear generic */ - BIGNUM X; - BIGNUM Y; - BIGNUM Z; /* Jacobian projective coordinates: (X, Y, Z) - * represents (X/Z^2, Y/Z^3) if Z != 0 */ + BIGNUM *X; + BIGNUM *Y; + BIGNUM *Z; /* Jacobian projective coordinates: * (X, Y, + * Z) represents (X/Z^2, Y/Z^3) if Z != 0 */ int Z_is_one; /* enable optimized point arithmetics for * special case */ -} /* EC_POINT */ ; +}; + +static ossl_inline int ec_point_is_compat(const EC_POINT *point, + const EC_GROUP *group) +{ + if (group->meth != point->meth + || (group->curve_name != 0 + && point->curve_name != 0 + && group->curve_name != point->curve_name)) + return 0; + + return 1; +} + +NISTP224_PRE_COMP *EC_nistp224_pre_comp_dup(NISTP224_PRE_COMP *); +NISTP256_PRE_COMP *EC_nistp256_pre_comp_dup(NISTP256_PRE_COMP *); +NISTP521_PRE_COMP *EC_nistp521_pre_comp_dup(NISTP521_PRE_COMP *); +NISTZ256_PRE_COMP *EC_nistz256_pre_comp_dup(NISTZ256_PRE_COMP *); +NISTP256_PRE_COMP *EC_nistp256_pre_comp_dup(NISTP256_PRE_COMP *); +EC_PRE_COMP *EC_ec_pre_comp_dup(EC_PRE_COMP *); + +void EC_pre_comp_free(EC_GROUP *group); +void EC_nistp224_pre_comp_free(NISTP224_PRE_COMP *); +void EC_nistp256_pre_comp_free(NISTP256_PRE_COMP *); +void EC_nistp521_pre_comp_free(NISTP521_PRE_COMP *); +void EC_nistz256_pre_comp_free(NISTZ256_PRE_COMP *); +void EC_ec_pre_comp_free(EC_PRE_COMP *); /* * method functions in ec_mult.c (ec_lib.c uses these as defaults if @@ -374,6 +390,17 @@ int ec_GFp_simple_field_mul(const EC_GROUP *, BIGNUM *r, const BIGNUM *a, const BIGNUM *b, BN_CTX *); int ec_GFp_simple_field_sqr(const EC_GROUP *, BIGNUM *r, const BIGNUM *a, BN_CTX *); +int ec_GFp_simple_blind_coordinates(const EC_GROUP *group, EC_POINT *p, + BN_CTX *ctx); +int ec_GFp_simple_ladder_pre(const EC_GROUP *group, + EC_POINT *r, EC_POINT *s, + EC_POINT *p, BN_CTX *ctx); +int ec_GFp_simple_ladder_step(const EC_GROUP *group, + EC_POINT *r, EC_POINT *s, + EC_POINT *p, BN_CTX *ctx); +int ec_GFp_simple_ladder_post(const EC_GROUP *group, + EC_POINT *r, EC_POINT *s, + EC_POINT *p, BN_CTX *ctx); /* method functions in ecp_mont.c */ int ec_GFp_mont_group_init(EC_GROUP *); @@ -451,14 +478,6 @@ int ec_GF2m_simple_field_sqr(const EC_GROUP *, BIGNUM *r, const BIGNUM *a, int ec_GF2m_simple_field_div(const EC_GROUP *, BIGNUM *r, const BIGNUM *a, const BIGNUM *b, BN_CTX *); -/* method functions in ec2_mult.c */ -int ec_GF2m_simple_mul(const EC_GROUP *group, EC_POINT *r, - const BIGNUM *scalar, size_t num, - const EC_POINT *points[], const BIGNUM *scalars[], - BN_CTX *); -int ec_GF2m_precompute_mult(EC_GROUP *group, BN_CTX *ctx); -int ec_GF2m_have_precompute_mult(const EC_GROUP *group); - #ifndef OPENSSL_NO_EC_NISTP_64_GCC_128 /* method functions in ecp_nistp224.c */ int ec_GFp_nistp224_group_init(EC_GROUP *group); @@ -549,7 +568,7 @@ void ec_GFp_nistp_points_make_affine_internal(size_t num, void *point_array, void ec_GFp_nistp_recode_scalar_bits(unsigned char *sign, unsigned char *digit, unsigned char in); #endif -int ec_precompute_mont_data(EC_GROUP *); +int ec_group_simple_order_bits(const EC_GROUP *group); #ifdef ECP_NISTZ256_ASM /** Returns GFp methods using montgomery multiplication, with x86-64 optimized @@ -559,10 +578,150 @@ int ec_precompute_mont_data(EC_GROUP *); const EC_METHOD *EC_GFp_nistz256_method(void); #endif -#ifdef OPENSSL_FIPS -EC_GROUP *FIPS_ec_group_new_curve_gfp(const BIGNUM *p, const BIGNUM *a, - const BIGNUM *b, BN_CTX *ctx); -EC_GROUP *FIPS_ec_group_new_curve_gf2m(const BIGNUM *p, const BIGNUM *a, - const BIGNUM *b, BN_CTX *ctx); -EC_GROUP *FIPS_ec_group_new_by_curve_name(int nid); -#endif +size_t ec_key_simple_priv2oct(const EC_KEY *eckey, + unsigned char *buf, size_t len); +int ec_key_simple_oct2priv(EC_KEY *eckey, const unsigned char *buf, size_t len); +int ec_key_simple_generate_key(EC_KEY *eckey); +int ec_key_simple_generate_public_key(EC_KEY *eckey); +int ec_key_simple_check_key(const EC_KEY *eckey); + +/* EC_METHOD definitions */ + +struct ec_key_method_st { + const char *name; + int32_t flags; + int (*init)(EC_KEY *key); + void (*finish)(EC_KEY *key); + int (*copy)(EC_KEY *dest, const EC_KEY *src); + int (*set_group)(EC_KEY *key, const EC_GROUP *grp); + int (*set_private)(EC_KEY *key, const BIGNUM *priv_key); + int (*set_public)(EC_KEY *key, const EC_POINT *pub_key); + int (*keygen)(EC_KEY *key); + int (*compute_key)(unsigned char **pout, size_t *poutlen, + const EC_POINT *pub_key, const EC_KEY *ecdh); + int (*sign)(int type, const unsigned char *dgst, int dlen, unsigned char + *sig, unsigned int *siglen, const BIGNUM *kinv, + const BIGNUM *r, EC_KEY *eckey); + int (*sign_setup)(EC_KEY *eckey, BN_CTX *ctx_in, BIGNUM **kinvp, + BIGNUM **rp); + ECDSA_SIG *(*sign_sig)(const unsigned char *dgst, int dgst_len, + const BIGNUM *in_kinv, const BIGNUM *in_r, + EC_KEY *eckey); + + int (*verify)(int type, const unsigned char *dgst, int dgst_len, + const unsigned char *sigbuf, int sig_len, EC_KEY *eckey); + int (*verify_sig)(const unsigned char *dgst, int dgst_len, + const ECDSA_SIG *sig, EC_KEY *eckey); +}; + +#define EC_KEY_METHOD_DYNAMIC 1 + +int ossl_ec_key_gen(EC_KEY *eckey); +int ossl_ecdh_compute_key(unsigned char **pout, size_t *poutlen, + const EC_POINT *pub_key, const EC_KEY *ecdh); +int ecdh_simple_compute_key(unsigned char **pout, size_t *poutlen, + const EC_POINT *pub_key, const EC_KEY *ecdh); + +struct ECDSA_SIG_st { + BIGNUM *r; + BIGNUM *s; +}; + +int ossl_ecdsa_sign_setup(EC_KEY *eckey, BN_CTX *ctx_in, BIGNUM **kinvp, + BIGNUM **rp); +int ossl_ecdsa_sign(int type, const unsigned char *dgst, int dlen, + unsigned char *sig, unsigned int *siglen, + const BIGNUM *kinv, const BIGNUM *r, EC_KEY *eckey); +ECDSA_SIG *ossl_ecdsa_sign_sig(const unsigned char *dgst, int dgst_len, + const BIGNUM *in_kinv, const BIGNUM *in_r, + EC_KEY *eckey); +int ossl_ecdsa_verify(int type, const unsigned char *dgst, int dgst_len, + const unsigned char *sigbuf, int sig_len, EC_KEY *eckey); +int ossl_ecdsa_verify_sig(const unsigned char *dgst, int dgst_len, + const ECDSA_SIG *sig, EC_KEY *eckey); + +int ED25519_sign(uint8_t *out_sig, const uint8_t *message, size_t message_len, + const uint8_t public_key[32], const uint8_t private_key[32]); +int ED25519_verify(const uint8_t *message, size_t message_len, + const uint8_t signature[64], const uint8_t public_key[32]); +void ED25519_public_from_private(uint8_t out_public_key[32], + const uint8_t private_key[32]); + +int X25519(uint8_t out_shared_key[32], const uint8_t private_key[32], + const uint8_t peer_public_value[32]); +void X25519_public_from_private(uint8_t out_public_value[32], + const uint8_t private_key[32]); + +/*- + * This functions computes a single point multiplication over the EC group, + * using, at a high level, a Montgomery ladder with conditional swaps, with + * various timing attack defenses. + * + * It performs either a fixed point multiplication + * (scalar * generator) + * when point is NULL, or a variable point multiplication + * (scalar * point) + * when point is not NULL. + * + * `scalar` cannot be NULL and should be in the range [0,n) otherwise all + * constant time bets are off (where n is the cardinality of the EC group). + * + * This function expects `group->order` and `group->cardinality` to be well + * defined and non-zero: it fails with an error code otherwise. + * + * NB: This says nothing about the constant-timeness of the ladder step + * implementation (i.e., the default implementation is based on EC_POINT_add and + * EC_POINT_dbl, which of course are not constant time themselves) or the + * underlying multiprecision arithmetic. + * + * The product is stored in `r`. + * + * This is an internal function: callers are in charge of ensuring that the + * input parameters `group`, `r`, `scalar` and `ctx` are not NULL. + * + * Returns 1 on success, 0 otherwise. + */ +int ec_scalar_mul_ladder(const EC_GROUP *group, EC_POINT *r, + const BIGNUM *scalar, const EC_POINT *point, + BN_CTX *ctx); + +int ec_point_blind_coordinates(const EC_GROUP *group, EC_POINT *p, BN_CTX *ctx); + +static ossl_inline int ec_point_ladder_pre(const EC_GROUP *group, + EC_POINT *r, EC_POINT *s, + EC_POINT *p, BN_CTX *ctx) +{ + if (group->meth->ladder_pre != NULL) + return group->meth->ladder_pre(group, r, s, p, ctx); + + if (!EC_POINT_copy(s, p) + || !EC_POINT_dbl(group, r, s, ctx)) + return 0; + + return 1; +} + +static ossl_inline int ec_point_ladder_step(const EC_GROUP *group, + EC_POINT *r, EC_POINT *s, + EC_POINT *p, BN_CTX *ctx) +{ + if (group->meth->ladder_step != NULL) + return group->meth->ladder_step(group, r, s, p, ctx); + + if (!EC_POINT_add(group, s, r, s, ctx) + || !EC_POINT_dbl(group, r, r, ctx)) + return 0; + + return 1; + +} + +static ossl_inline int ec_point_ladder_post(const EC_GROUP *group, + EC_POINT *r, EC_POINT *s, + EC_POINT *p, BN_CTX *ctx) +{ + if (group->meth->ladder_post != NULL) + return group->meth->ladder_post(group, r, s, p, ctx); + + return 1; +} |